write the formula for refractive index of a prism
Answers
Answer: n=cv n = c v .
Explanation:
The refractive index of any material is always n>1 , since light is fastest in vacuum, that is, c>v . The index of refraction of a material varies with the frequency (or wavelength) of light being used (known as dispersion).
AIM: Using the i-d curve approach, find the refractive index of the material of a given prism.
Required materials: Prism, 20 × 20 cm white chart piece, pencil, pins, scale, and protractor
PROCEDURE:
Take a prism and lay it on the white chart so that the triangular base of the prism is visible.
Using a pencil, draw a circle around the prism. Take out the prism.
It's shaped like a triangle. P, Q, and R are the vertices.
Determine the angle formed by PQ and PR. This is the prism's angle (A).
Draw a perpendicular to the PQ at M and mark M on the side of the triangle PQ.
Please join M and N. The light route is represented by the letters A,B,M,N, C, and D.
Extend both incident and emergent rays to a point 'O' and they will meet.
Angle of deviation, represented as 'D,' is the angle formed by these two beams.
Repeat for different incidence angles, such as 40°, 50°, and so on.
The graph depicted in figure is obtained by taking the angle of incidence along the x-axis and the angle of deviation along the y-axis.